The observation of neutrino oscillations [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]} was the first direct hint that the Standard Model of particle physics is imperfect and must be extended. Lepton flavor universality (LFU), a solid prediction of the SM, can be easily violated in the beyond SM (BSM) models, where the particles preferentially couple to certain generations of leptons. In the last several years, indications of LFU violation (LFUV) have been observed in both \(b\rightarrow s\ell \ell \)  and \(b\rightarrow c\ell \nu \)  processes. Observables associated with these transitions are the well-known ratios:
\(&R_{K^{(\ast )}}= \frac{Br\left(B\rightarrow K^{(\ast )}\mu ^+\mu ^- \right)}{Br\left(B\rightarrow K^{(\ast )}e^+e^- \right)},\\&R_{D^{(\ast )}}= \frac{Br\left(B\rightarrow D^{(\ast )}\tau \overline{\nu }_\tau \right)}{Br\left(B\rightarrow D^{(\ast )}\ell \overline{\nu }\right)},\;\;\; \textrm {with \ell = e, \mu },\) 
